The Federal Reserve Bank of Dallas said in a Feb. 11 statement that Hobby will continue to serve as chairman of the board of the Houston branch, while Armstrong will stay in his role as chairman pro tem in 2013.

Four of the seven members of the Houston branch board are appointed by the Federal Reserve Bank of Dallas board of directors, while the other three are appointed Federal Reserve System Board of Governors in Washington, D.C.

Plains All American was the fifth-largest public company in Houston last year with revenue of $34 billion in 2011 revenue, up 32.4 percent from the previous year, according to the HBJ’s annual list of the largest public companies in Houston.